从自建语料库看英语新闻标题的文体特色

本文以yahoo网站主页的每日新闻标题为材料自建语料库,分两次从中选出英语新闻标题共280条,每次140条,旨在用语料库的方法证实英语新闻标题是否在语法上(动词时态上、语态上)、用词上等方面有其显著特点。     

A study of results overlap and uniqueness among major Web search engines

The performance and capabilities of Web search engines is an important and significant area of research. Millions of people world wide use Web search engines very day. This paper reports the results of a major study examining the overlap among results retrieved by multiple Web search engines for a large set of more than 10,000 queries. Previous smaller studies have discussed a lack of overlap in results returned by Web search engines for the same queries. The goal of the current study was to conduct a large-scale study to measure the overlap of search results on the first result page (both non-sponsored and sponsored) across the four most popular Web search engines, at specific points in time using a large number of queries. The Web search engines included in the study were MSN Search, Google, Yahoo! and Ask Jeeves. Our study then compares these results with the first page results retrieved for the same queries by the metasearch engine Dogpile.com. Two sets of randomly selected user-entered queries, one set was 10,316 queries and the other 12,570 queries, from Infospace’s Dogpile.com search engine (the first set was from Dogpile, the second was from across the Infospace Network of search properties were submitted to the four single Web search engines). Findings show that the percent of total results unique to only one of the four Web search engines was 84.9%, shared by two of the three Web search engines was 11.4%, shared by three of the Web search engines was 2.6%, and shared by all four Web search engines was 1.1%. This small degree of overlap shows the significant difference in the way major Web search engines retrieve and rank results in response to given queries. Results point to the value of metasearch engines in Web retrieval to overcome the biases of individual search engines.     

社会化问答社区中糖尿病健康信息的需求分析

为了解消费者对糖尿病信息的需求,选取雅虎问答中糖尿病相关的8762条提问记录作为研究对象,根据糖尿病信息的类目体系及分类策略对其进行人工编码,再进行文本处理,获得表征糖尿病健康信息需求的587个中心词,并通过多维尺度分析方法,对每个需求类目下的中心词进一步聚类发现,消费者对于糖尿病健康信息最大的关注点是日常疾病管理、疾病确诊和治疗,而对疾病预防缺乏应有的关注度。     

Regulation of international information flows

In this article, the authors analyze the popular search queries used in Google and Yahoo! over a 24-month period, January 2004–December 2005. They develop and employ a new methodology and metrics to examine and assess the digital divide in information uses, looking at the extent of political searches and their accuracy and variety. The findings indicate that some countries, particularly Germany, Russia, and Ireland, display greater accuracy of search terms, diversity of information uses, and sociopolitical concern. Also, in many English-speaking and Western countries most popular searches were about entertainment, implying a certain gap within these countries between the few who search for economic and political information and the many who do not.     

一个基于ASP.NET与Yahoo Web APIs的搜索网站的实现

继Google之后，Yahoo公司也发布了免费和受限的Web搜索服务APIs。本文介绍了Yahoo搜索服务的技术特点，简述了调用接口和返回文档结构，给出了一个基于ASP.NET的搜索网的技术要点和实现代码，设计并实现了一个搜索网实例。     

关于冒号分类法与Yahoo分类关系的研究

冒号分类法和Yahoo分类都是以主题为中心设类，以分析兼综合的方式组织资源。文章通过比较的方式，对冒号分类法与Yahoo分类的相同之处和差异性做了探讨。     

解析图书馆信息组织在互联网发展三个时期的定位、演变及趋势

互联网发展经历了门户网站、搜索引擎和开放平台三个时期。门户时期,图书馆大力发展分类导航;搜索引擎时期,图书馆资源检索工具层出不穷;在当今开放平台逐渐占据互联网市场的情势下,图书馆也可考虑运用开放平台的核心技术———OpenAPI来实现其尚待改善的资源揭示服务。表1。     

Information Science in the Curriculum

ABSTRACT

This article takes an in-depth look at the Internet mega search engines and their influence on reference librarianship.     

Google、Yahoo和百度的图像搜索比较

Google、Yahoo、百度是用户搜索信息时常用的三个搜索引擎,它们都为用户提供全面的搜索功能。针对Google、Yahoo、百度的中文图像搜索功能进行分析比较。从搜索的响应时间、检索出图像的数量、准确性、检索结果的排序等方面进行了对比分析,并对图像搜索的工作原理进行了简单介绍。